Close this search box.
Mechanical Actuators
A Leader in Heat Transfer Components, Products and Systems

SPB Series Linear Actuator

SPB Series linear actuators from Duff Norton provide 500 lbs. capacity for lifting/lowering and other motion control applications. They include load limiting friction disc clutches for improved performance, and operate at speeds up to 1.3 in/sec (33 mm/s). SPB Series actuators are powered by 115 VAC or 220 VAC (varies by model), and are available with strokes of 3”, 6”, 12”, and 18” (76 mm, 152 mm, 304 mm, and 457 mm).

Request a quote on SPB Series linear actuators. Contact C.H. Bull for more information.

SPB Series Linear Actuator Specifications

  • Capacity: 500 lbs. (750 lbs. static load)
  • Speed: 0.58 to 1.3 in/sec (15 to 33 mm/sec)
  • Power: 115 VAC or 220 VAC (varies by model)
  • Stroke: 3” (76 mm), 6” (152 mm), 12” (304 mm), 18” (457 mm)
  • Working temp. range: -20°F to 120°F (-29°C to 50°C)
  • Tube restraining torque: 60 in-lbf
  • IP50 protection standard; IP52 protection available

Features & Benefits of SPB Series Actuators

  • Heavy duty design & engineering for long life in challenging applications
  • Acme screw design with patented spring-type brake
  • Load limiting friction disc clutch
  • Aluminum housing & outer tube; zinc-chromate plated steel translating tube
  • Double clevis mounting
  • Automatic reset for thermal overload motor protection
  • Optional capacitor (standard on 220 VAC models)
  • Optional IP52 weather-resistant sealant
  • Optional bellows boot
  • Optional threaded ends

Linear Actuator Selection Guide

To determine which AC-powered linear actuator is best for your application, consider the factors below. As needed, C.H. Bull is available to help you select the right model for your unique needs. Contact us to discuss your application requirements.

  • Capacity: The force required the move and hold the load (total weight of the load)
  • Voltage: The voltage needed to power the actuator
  • Travel: The distance/range of motion required (stroke)
  • Speed: The speed at which the load must be moved
  • Duty Cycle: Percentage of time an actuator is in motion relative to total time
  • Orientation: The direction in which the actuator’s force is applied
  • Environment: The working conditions in which the actuator will operate

Contact C.H. Bull for Duff Norton SPB Series Linear Actuators 

Whatever your motion control needs, we have the right actuator for the job. Request a quote on SPB series linear actuators for your application, or contact C.H. Bull for more information.

Request a Quote
close slider

Request a Quote - Heat Transfer Solutions

Contact Information





I am interested in...
(Check all that apply)
Drop files here or
Max. file size: 50 MB, Max. files: 5.